Chapter 17 Geo Questions
Name _______________________ Per ________
Ch 17.1, page 447
1. What early evidence suggested that Earth’s continents might be moving?
2. How do ancient glacial deposits in Africa, India, Australia, and South America
support the idea of continental drift?
3. How did Alfred Wegener use rock and fossil evidence to support his
hypothesis?
4. Why was Wegener’s hypothesis rejected by most scientists of the early
1900s?
5. Oil deposits approximately 200 million years old have been discovered in
Brazil. Where might geologists find oil deposits of a similar age?
Ch 17.2, page 454
1. How do ocean ridges and deep-sea trenches support the theory of seafloor
spreading?
2. Explain how ocean-floor rocks and sediments are evidence of seafloor
spreading.
3. Compare and contrast normal magnetic polarity and reversed magnetic
polarity.
4. Explain how an isochron map of the ocean floor supports the theory of
seafloor spreading.
Chapter 17 Geo Questions
Name _______________________ Per ________
Ch 17.1, page 447
1. What early evidence suggested that Earth’s continents might be moving?
2. How do ancient glacial deposits in Africa, India, Australia, and South America
support the idea of continental drift?
3. How did Alfred Wegener use rock and fossil evidence to support his
hypothesis?
4. Why was Wegener’s hypothesis rejected by most scientists of the early
1900s?
5. Oil deposits approximately 200 million years old have been discovered in
Brazil. Where might geologists find oil deposits of a similar age?
Ch 17.2, page 454
1. How do ocean ridges and deep-sea trenches support the theory of seafloor
spreading?
2. Explain how ocean-floor rocks and sediments are evidence of seafloor
spreading.
3. Compare and contrast normal magnetic polarity and reversed magnetic
polarity.
4. Explain how an isochron map of the ocean floor supports the theory of
seafloor spreading.
Ch 17.3, page 459
1. Explain the theory of plate tectonics.
2. Explain what happens at the three types of plate boundaries. Sketch each.
3. What geologic features are associated with each type of convergent
boundary?
4. Where do transform boundaries most commonly occur?
Ch 17.4, page 463
1. Make and label a diagram that explains the process of convection.
2. What are the relationships among mantle convection, ocean ridges, and
subduction zones?
3. Hypothesize what might happen to mantle convection currents beneath a
continental-continental convergent boundary.
4. How have earthquake data been used to explore the size of convection
currents in the mantle?
Ch 17.3, page 459
1. Explain the theory of plate tectonics.
2. Explain what happens at the three types of plate boundaries. Sketch each.
3. What geologic features are associated with each type of convergent
boundary?
4. Where do transform boundaries most commonly occur?
Ch 17.4, page 463
1. Make and label a diagram that explains the process of convection.
2. What are the relationships among mantle convection, ocean ridges, and
subduction zones?
3. Hypothesize what might happen to mantle convection currents beneath a
continental-continental convergent boundary.
4. How have earthquake data been used to explore the size of convection
currents in the mantle?